feat(inventory): one service inventory drives planner, allow-lists, and seams

rank 3. shared/services.yml is the single source of truth for every
deployable service (hosts, unit dirs, units, path claims, tests, scrape/
dns/probe facts, aliases, stacks); scripts/service-map.py is its only
reader (hosts/services/allows/plan/seams/owner/units/stack/get/render/
check). deploy-plan.py becomes a thin CLI wrapper; both --service
allow-lists (deploy.sh, deploy-remote.sh) and the changed-test mapper are
the inventory. Selection semantics: host scoping (a host's tree selects
only its own services), the quadlet netns/network coupling graph resolved
across directories (gluetun's riders live in their own dirs), stacks, and
canonical restart order.

Against the pinned old-planner fixture: 921 raw deltas reduced to 17, all
intentional (anubis now maps; cross-host paths select nothing; the retired
qwen-sharp template plans nothing and the live froggeric template plans
frank-archon; dankserver/romm/romm.container, missed by the old filename
rule, plans the romm trio). The fixture is regenerated as the new pin.

Integrity gates: schema, unit claims, quadlet-file ownership, path-glob
liveness, Pi-hole hosts / Prometheus jobs / DNS / homepage probes drift.
tests/service_inventory.bats pins all of it plus the plan fixture and the
deploy-plan CLI. Allow-list grep seams in hermes_webui/observability_quadlet
become behavioral allows calls.

tests/hermes_webui.bats

@@ -101,7 +101,10 @@ webui_service_yaml() {
 }
 
 @test "remote deployer accepts and dispatches hermes-webui" {
-    grep -q 'dankclaw:hermes-webui' "$REMOTE_DEPLOY"
+    # Acceptance is the inventory (rank 3): the old literal allow-list in
+    # the remote runner is retired.
+    run python3 "$REPO_ROOT/scripts/service-map.py" allows --host dankclaw --service hermes-webui
+    [ "$status" -eq 0 ]
     # Dispatched to the unit handler, never to compose: deploy_hermes installs
     # the quadlets and retires compose-era containers.
     grep -q 'hermes|hermes-dashboard|hermes-webui) deploy_hermes' "$REMOTE_DEPLOY"
@@ -111,5 +114,7 @@ webui_service_yaml() {
 }
 
 @test "top-level deployer accepts hermes-webui as a Dankclaw service" {
-    grep -q 'dankclaw:hermes-webui' "$DEPLOY"
+    # deploy.sh validates --service through the inventory's allows.
+    run python3 "$REPO_ROOT/scripts/service-map.py" allows --host dankclaw --service hermes-webui
+    [ "$status" -eq 0 ]
 }